Method of strengthening hair fibers and protecting dyed hair color from fading or wash-out

ABSTRACT

Disclosed is a method of strengthening hair fibers using a hair composition comprising an amide and/or an alkyl ammonium carboxylate salt. The amide can be a monoamide and/or a bisamide. A method of protecting dyed hair color from fading or wash-out using the hair composition is also included.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims the benefit under 35 U.S.C. 119 (e) ofU.S. Provisional Patent Application Ser. No. 62/190,922, filed on Jul.10, 2015, the entire content of which is hereby expressly incorporatedherein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Disclosed and Claimed Inventive Concepts

The presently disclosed and/or claimed inventive process(es),procedure(s), method(s), product(s), result(s), and/or concept(s)(collectively hereinafter referred to as the “presently disclosed and/orclaimed inventive concept(s)”) relates generally to a method ofstrengthening hair fibers using a hair composition comprising an amideand/or an alkyl ammonium carboxylate salt. A method of protecting dyedhair color from fading or wash-out using the hair composition is alsoincluded.

2. Background and Applicable Aspects of the Presently Disclosed andClaimed Inventive Concept(s)

Hair can suffer damage from a number of sources. The hair fiber can bedamaged by environmental influences such as exposure to UV and chlorine;chemical influences such as dyeing, bleaching, perming, andover-frequent washing with harsh surfactant based cleansing shampoocompositions; and mechanical influences such as prolonged use of heatedstyling appliances. Consequently, the hair dries and becomes brittle,split ends are formed or the hair may break and lose its strength, whilehair constituent proteins are eluted by treatments with shampoos, permchemicals, hair dyes or the like and thus the proteins graduallydisappear. Thus, with the elution of the proteins, the hair becomesthinner and the likelihood of damage increases. The hair, once damaged,is unable to restore itself to its original state. Therefore, it isnecessary to protect the hair from damage, and in case of damage, torepair the damaged hair, in order to keep the hair beautiful andhealthy.

It is well-known that the hair protein contains a lot of differentchemical groups such as anionic, cationic groups consisting of sulfate,amino groups, hydrogen-bonding groups and etc. These groups provide manyopportunities to repair, to strengthen and to improve/beautify the(damaged) hair. Based on these principles, many hair care products havebeen developed.

The coloring of hair has become increasingly popular in recent years.However, fading of artificial hair color has become a common problem anda frequent complaint by consumers. Fading can occur during the shampoowashing treatment as color wash-out, or can be initiated byenvironmental circumstances, such as by exposure to UV radiation. Thewashing process is the most significant factor in the removal of haircolor, while UV exposure has a significant impact only after 90 hours ofintense irradiation. Furthermore, the surfactants present in shampooformulations provide a wetting function which brings moisture into thehair shaft, thus facilitating the removal of the dye molecules to exitduring the water rinsing process. Maintaining hair color and minimizinghair color fading is highly desirable in the hair care market.

There still remains a need for topical hair treatment compositions whichcan strengthen hair, repair damaged hair and protect the dyed haircolor.

Surprisingly, it has been found that a hair composition comprising anamide and/or an alkyl ammonium carboxylate salt can be used tostrengthen the hair and repair the damaged hair. The hair compositioncan also be used to protect dyed hair color from fading or wash-out.

DETAILED DESCRIPTION OF THE INVENTIVE CONCEPT(S)

Before explaining at least one embodiment of the presently disclosedand/or claimed inventive concept(s) in detail, it is to be understoodthat the presently disclosed and/or claimed inventive concept(s) is notlimited in its application to the details of construction and thearrangement of the components or steps or methodologies set forth in thefollowing description or illustrated in the drawings. The presentlydisclosed and/or claimed inventive concept(s) is capable of otherembodiments or of being practiced or carried out in various ways. Also,it is to be understood that the phraseology and terminology employedherein is for the purpose of description and should not be regarded aslimiting.

Unless otherwise defined herein, technical terms used in connection withthe presently disclosed and/or claimed inventive concept(s) shall havethe meanings that are commonly understood by those of ordinary skill inthe art. Further, unless otherwise required by context, singular termsshall include pluralities and plural terms shall include the singular.

All patents, published patent applications, and non-patent publicationsmentioned in the specification are indicative of the level of skill ofthose skilled in the art to which the presently disclosed and/or claimedinventive concept(s) pertains. All patents, published patentapplications, and non-patent publications referenced in any portion ofthis application are herein expressly incorporated by reference in theirentirety to the same extent as if each individual patent or publicationwas specifically and individually indicated to be incorporated byreference.

All of the compositions and/or methods disclosed herein can be made andexecuted without undue experimentation in light of the presentdisclosure. While the compositions and methods of the presentlydisclosed and/or claimed inventive concept(s) have been described interms of preferred embodiments, it will be apparent to those of ordinaryskill in the art that variations may be applied to the compositionsand/or methods and in the steps or in the sequence of steps of themethod described herein without departing from the concept, spirit andscope of the presently disclosed and/or claimed inventive concept(s).All such similar substitutes and modifications apparent to those skilledin the art are deemed to be within the spirit, scope and concept of thepresently disclosed and/or claimed inventive concept(s).

As utilized in accordance with the present disclosure, the followingterms, unless otherwise indicated, shall be understood to have thefollowing meanings.

The use of the word “a” or “an” when used in conjunction with the term“comprising” may mean “one,” but it is also consistent with the meaningof “one or more,” “at least one,” and “one or more than one.” The use ofthe term “or” is used to mean “and/or” unless explicitly indicated torefer to alternatives only if the alternatives are mutually exclusive,although the disclosure supports a definition that refers to onlyalternatives and “and/or.” Throughout this application, the term “about”is used to indicate that a value includes the inherent variation oferror for the quantifying device, the method being employed to determinethe value, or the variation that exists among the study subjects. Forexample, but not by way of limitation, when the term “about” isutilized, the designated value may vary by plus or minus twelve percent,or eleven percent, or ten percent, or nine percent, or eight percent, orseven percent, or six percent, or five percent, or four percent, orthree percent, or two percent, or one percent. The use of the term “atleast one” will be understood to include one as well as any quantitymore than one, including but not limited to, 1, 2, 3, 4, 5, 10, 15, 20,30, 40, 50, 100, etc. The term “at least one” may extend up to 100 or1000 or more depending on the term to which it is attached. In addition,the quantities of 100/1000 are not to be considered limiting as lower orhigher limits may also produce satisfactory results. In addition, theuse of the term “at least one of X, Y, and Z” will be understood toinclude λ alone, Y alone, and Z alone, as well as any combination of X,Y, and Z. The use of ordinal number terminology (i.e., “first”,“second”, “third”, “fourth”, etc.) is solely for the purpose ofdifferentiating between two or more items and, unless otherwise stated,is not meant to imply any sequence or order or importance to one itemover another or any order of addition.

As used herein, the words “comprising” (and any form of comprising, suchas “comprise” and “comprises”), “having” (and any form of having, suchas “have” and “has”), “including” (and any form of including, such as“includes” and “include”) or “containing” (and any form of containing,such as “contains” and “contain”) are inclusive or open-ended and do notexclude additional, unrecited elements or method steps. The term “orcombinations thereof” as used herein refers to all permutations andcombinations of the listed items preceding the term. For example, “A, B,C, or combinations thereof” is intended to include at least one of: A,B, C, AB, AC, BC, or ABC and, if order is important in a particularcontext, also BA, CA, CB, CBA, BCA, ACB, BAC, or CAB. Continuing withthis example, expressly included are combinations that contain repeatsof one or more item or term, such as BB, AAA, MB, BBC, AAABCCCC, CBBAAA,CABABB, and so forth. The skilled artisan will understand that typicallythere is no limit on the number of items or terms in any combination,unless otherwise apparent from the context.

As used herein the term “hair” or “hair fiber(s)” be treated may be“living” i.e. on a living body or may be “non-living” i.e. in a wig,hairpiece or other aggregation of nonliving keratinous fibers.Mammalian, human hair is preferred. However wool, fur and other keratincontaining fibers are suitable substrates for the compositions accordingto the presently disclosed and/or claimed inventive concept(s). “Hair”and “hair fiber(s) are used interchangeably in the presently disclosedand/or claimed inventive concept(s).

“Virgin hair” means hair that has never been treated chemically and/ormechanically including but not limited to coloring, bleaching, relaxing,straightening, perming, grooming, and exposures to sun, UV light, saltywater, heat appliance, etc.

As used herein, the expression “leave-on compositions” designatescompositions which are not rinsed with water once applied to the hair.

As used herein, the expression“rinse-off compositions” designatescompositions which are rinsed with water once applied to the hair.

As used herein, the expression “dyed hair” means hair which has beencolored with a permanent, semi-permanent or temporary artificial color,which can be different from the original color of the hair.

As used herein, the expression “dyed hair color fading” means the colorerosion of dyed hair.

The presently disclosed and/or claimed inventive concept(s) relatesgenerally to a method of strengthening hair fibers comprising applying ahair composition comprising an amide and/or an alkyl ammoniumcarboxylate salt. The amide can be a monoamide and/or a bisamide. Thehair fibers can include virgin hair and damaged or weakened hair fibers.

In one non-limiting embodiment, the hair composition can be representedby Formula (I), or Formula (II), or Formula (I) and Formula (II).

wherein R₁-R₄ are independently hydrogen, a hydrocarbon radical having 1to about 10 carbon atoms, a hydroxyl group, an amino group, a sulfhydrylgroup, an aryl group, or a halogen; and R₅ and R₆ are independentlyhydrogen, an aliphatic hydrocarbon group, an alicyclic hydrocarbongroup, an aryl group, an alkylaryl group, or a heterocyclic group. Thealiphatic hydrocarbon group, the alicyclic hydrocarbon group, the arylgroup, the alkylaryl group, or the heterocyclic group can be substitutedwith at least one hydroxyl group.

wherein R′₁-R′₄ are independently hydrogen, a hydrocarbon radical having1 to about 10 carbon atoms, a hydroxyl group, an amino group, asulfhydryl group, an aryl group, an alkylaryl group or a halogen; andR′₅ and R′₆ are independently hydrogen, an aliphatic hydrocarbon group,an alicyclic hydrocarbon group, an aryl group, an alkylaryl group, or aheterocyclic group, excluding R′₅ and R′₆ being simultaneous hydrogens.The aliphatic hydrocarbon group, the alicyclic hydrocarbon group, thearyl group, the alkylaryl group or the heterocyclic group can besubstituted with at least one hydroxyl group.

The amounts of Formula (I) and Formula (II) can be varied when the haircomposition comprises Formulas (I) and (II). The mole percentages ofFormula (I) to Formula (II) can be varied from 0.1 mole % to 99.9 mole%. In one non-limiting embodiment, the molar ratio of Formula (I) toFormula (II) can be 1:99 to 99:1. In another non-limiting embodiment,the molar ratio of Formula (I) to Formula (II) can be 20:80 to 80:20. Inyet another non-limiting embodiment, the molar ratio of Formula (I) toFormula (II) can be 40:60 to 60:40.

In another non-limiting embodiment, the hair composition can berepresented by formulations selected from the group consisting ofFormula (III), Formula (IV), Formula (V), and combinations thereof.

wherein R′₁-R′₄ are independently hydrogen, a hydrocarbon radical having1 to about 10 carbon atoms, a hydroxyl group, an amino group, asulfhydryl group, an aryl group, or a halogen; and R′₅ and R′₆ areindependently hydrogen, an aliphatic hydrocarbon group, an alicyclichydrocarbon group, an aryl group, an alkylaryl group, or a heterocyclicgroup. L is a linker and can be an aliphatic hydrocarbon group, analicyclic hydrocarbon group, an aryl group, an alkylaryl group, or aheterocyclic group. The aliphatic hydrocarbon group, the alicyclichydrocarbon group, the aryl group, the alkylaryl group or theheterocyclic group can be further substituted by other functional groupscontaining oxygen, sulfur, nitrogen, halogen, and etc.

The molar ratios of Formula (III)+Formula (IV) to Formula (V) can bevaried when the hair composition comprises Formulas (III), (IV) and (V).In one non-limiting embodiment, the molar ratio of Formula (III)+Formula(IV) to Formula (V) can be 1:99 to 99:1. In another non-limitingembodiment, the molar ratio of Formula (III)+Formula (IV) to Formula (V)can be 20:80 to 80:20. In yet another non-limiting embodiment, the molarratio of Formula (III)+Formula (IV) to Formula (V) can be 40:60 to60:40.

The hair composition of Formula (I), and/or Formulation (II) cancomprise a reaction product of at least one lactone compound and atleast one amino alcohol compound. The amino alcohol compound cancomprise one, two, three, or more hydroxyl groups.

In one non-limiting embodiment, the amino alcohol compound can berepresented by Formula (VI):

wherein R₁ and R₂ each represents an aliphatic hydrocarbon group, analicyclic hydrocarbon group, an aryl group, or a heterocyclic group,where these groups are substituted with at least one hydroxyl group; andR₃ is hydrogen or an alkyl group having 1 to about 12 carbon atoms.

The aliphatic hydrocarbon group used herein can include saturated orunsaturated, liner or branched, substituted or unsubstituted aliphatichydrocarbon groups. Examples of the aliphatic hydrocarbon groups caninclude, but are not limited to, a straight or branched alkyl grouphaving 1 to about 12 carbon atoms, such as a methyl group, an ethylgroup, a propyl group, an isopropyl group, a butyl group, an isobutylgroup, an sec-butyl group, a t-butyl group, a pentyl group, a hexylgroup, an octyl group, and a decyl group; an alkenyl group having 1 to12 carbon atoms, such as a vinyl group, an allyl group, a 1-propenylgroup, an isopropenyl group, and a 2-butenyl group; and an alkynyl grouphaving 1 to 12 carbon atoms, such as a 2-propynyl group, and a 2-butynylgroup.

The alicyclic hydrocarbon group used herein can include saturated orunsaturated, substituted or unsubstituted alicyclic hydrocarbon groups,Examples of the alicyclic groups can include, but are not limited to, acycloalkyl group having about 3 to about 10 carbon atoms, such as acyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cyclooctylgroup; and a cycloalkenyl group having about 3 to about 10 carbon atoms,such as a cyclopentenyl group, and a cyclohexenyl group.

The aryl group used herein can comprise about 6 to about 14 carbonatoms, such as a phenyl group, and a naphthyl group.

The heterocyclic group used herein can include those containing at leastone heteroatom selected from the group consisting of a nitrogen atom, anoxygen atom, and a sulfur atom. The heterocyclic group may be anaromatic heterocyclic group, a non-aromatic heterocyclic group, or acompound heterocyclic group.

A heterocyclic ring of the above-mentioned heterocyclic group caninclude a nitrogen-containing heterocyclic ring such as pyrroline,pyrrole, piperidine, piperazine, pyridine, pyrimidine, pyridazine,triazole, and quinoline; an oxygen-containing heterocyclic ring such astetrahydrofuran, furan, and pyran; a sulfur-containing heterocyclic ringsuch as tetrahydrothiophene, and thiophene; and a heterocyclic ringcontaining at least two heteroatoms selected from the group consistingof a nitrogen atom, an oxygen atom, and a sulfur atom, such asthiazoline, thiazolidine, thiazole, thiazine, and morpholine.

In another non-limiting embodiment, the amino alcohol compound can berepresented by Formula (VII):

where R₁ and R₂ are independently H, an alkyl group having 1 to about 20carbon atoms, or an alkyl group having 1 to about 20 carbon atomssubstituted with at least one hydroxyl group; and R is an alkyl oralkenyl having about 2 to about 16 carbon atoms.

In yet another non-limiting embodiment, the amino alcohol compound canbe represented by Formula (VIII):

where R₁ and R₂ are an alkyl group having 1 to about 20 carbon atoms, oran alkyl group having 1 to about 20 carbon atoms substituted with atleast one hydroxyl group.

Examples of the amino alcohol compound can include, but are not limitedto, ethanolamine, 2-hydroxyethylhydrazine, 2-methoxyethylamine,3-amino-1-propanol, amino-2-propanol, 3-amino-1,2-propaediol, serinol,1,3-diamino-2-propanol, 1-amino-2-methyl-2-propanol,2-(ethylamino)ethanol, 2-amino-1-butanol, 2-amino-2-methyl-1propanol,3-methylamino-1-propanol, 4-amino-1-butanol, 2-(2-aminoethoxy)ethanol,3-methylamino-1,2-propanediol, diethanolamine,tris(hydroxymethyl)aminomethane, N-(2-hydroxyethyl)ethylenediamine,meso-1,4-diamino-2,3-butanediol, 2-aminocyclopentanol,2-(isopropylamino)ethanol, 2-(propylamino)ethanol,2-amino-3-methyl-1-butanol, 5-amino-1-pentanol,2-(3-aminopropylamino)ethanol, 1-amino-1-cyclopentanemethanol,4-aminocyclohexanol, 2-(butylamino)ethanol, 6-amino-1-hexanol,DL-2-amino-1-hexanol, leucinol, N,N′-bis(2-hydroxyethyl)ethylenediamine,2-aminobenzyl alcohol, 3-aminolbenzyl alcohol, 4-aminobenzyl alcohol,2-amino-4-methoxyphenol, 3,4-dihydroxybenzylamine, dihydroxybenzylamine,1-aminomethyl-1-cyclohexanol, 2-aminomethyl-1-cyclohexanol,N-Boc-ethanolamine, 5-amino-2,2-dimethylpentanol,2-amino-1-phenylethanol, 2-amino-3-methylbenzyl alcohol,2-amino-5-methylbenzyl alcohol, 2-aminophenylethyl alcohol3-amino-2-methylbenzyl alcohol, 3-amino-4-methylbenzyl alcohol,4-(1-hydroxyethyl)aniline, 4-aminophenethyl alcohol,N-(2-hydroxyethyl)aniline, 3-hydroxy-4-methoxybenzylamine,3-hydroxytyramine, 6-hydroxydopamine, 4-(Z-amino)-1-butanol,5-(Z-amino)-1-pentanol, 4-(Z-amino)cyclohexanol, 6-(Z-amino)-1-hexanol,3-(Boc-amino)-1-propanol, N-Boc-serinol, 2-benzylaminoethanol,4-(Boc-amino)-1-butanol,2-(aminomethyl)-2-(hydroxymethyl)-1,3-propanediol, and2-(2-aminoethyl)-2-(hydroxymethyl)-1,3-propanediol.

The hair composition of Formula (III), or Formula (IV) or Formula (V) orthe combinations can comprise a reaction product of at least one lactonecompound and at least one alkyl diamine compound.

The alkyl diamine compound can contain about 2 to about 12 carbon atoms.In one non-limiting embodiment, the alkyl diamine compound can containabout 2 to about 6 carbon atoms. Examples of the alkyl diamine compoundcan include, but are not limited to, ethylenediamine,1,3-diaminopropane, 1,4-diaminobutane, 1,5-diaminopentane, hexamethylenediamine, 1,7-diaminohepatane, 1,8-diaminooctane, 1,9-nonanediamine,1,10-diaminodecane, and dodecanethylenediamine. In one non-limitingembodiment, the alkyl diamine is ethylenediamine. In anothernon-limiting embodiment, the alkyl diamine is 1,3-diaminopropane.

The lactone compound of the presently disclosed and/or claimed inventiveconcept(s) can include, but are not limited to, a cyclic ester compoundcomprising a heterocyclic ring and the heteroatom on the heterocyclicring is oxygen, which can be represented by Formula (IX):

wherein R and R′ are independently H and a hydrocarbon radicalcontaining from 1 to about 40 carbon atoms that may be saturated orunsaturated, linear or branched, substituted or unsubstituted. Thehydrocarbon radicals can comprise hydroxyl groups, amino groups,sulfhydryl groups, aryl groups and halogens. n is an integer of 1 toabout 10. Y is oxygen or sulfur. The heterocyclic ring can be saturatedor unsaturated.

The lactone compound can comprise 3- to 8-membered rings (including theoxygen on the heterocyclic ring and the carbonyl carbon). Examples ofsuch lactone compounds can include, but are not limited to, α-lactones(3-membered ring alpha-lactones), β-lactones (4-membered ringbeta-lactones), γ-lactones (5-membered ring gamma-lactones), δ-lactones(6-membered ring delta-lactones) and ε-lactones (8-membered ringepsilon-lactones).

In one non-limiting embodiment, the lactone compound can be a δ-lactone.In one non-limiting embodiment, the δ-lactone can be represented byFormula (X):

wherein R₁-R₄ are independently H, a hydrocarbon radical having 1 toabout 10 carbon atoms, a hydroxyl group, an amino group, a sulfhydrylgroup, an aryl group, or a halogen.

In one non-limiting embodiment, R₁-R₄ are independently a hydrocarbonradical being linear or branched, saturated or unsaturated, orsubstituted or unsubstituted.

Examples of the δ-lactone compounds can include, but are not limited to,meadowfoam δ-lactone, δ-octalactone, δ-decalactone, δ-nonalactone,undecanoic δ-lactone, δ-dodecalactone, massoia lactone (or5-pentylpent-2-en-5-olide), jasmine lactone (orZ-2-pentenylpentan-5-olide), 6-pentyl-alpha-pyrone (or5-pentylpenta-2,4-dien-5-olide) δ-valerolactone, galactonolactone,glucono δ-lactone, hexadecanolactone, and mevalonolactone.

According to the presently disclosed and/or claimed inventiveconcept(s), the lactone compound, the alkyl diamine compound or aminoalcohol compound, and a solvent can be mixed together at roomtemperature (˜23° C.) to form a mixture. The mixture can be heated toabout 30° C. to about 100° C. for at least 30 minutes to form a reactionproduct of the presently disclosed and/or claimed inventive concept(s).In one non-limiting embodiment, the mixture can be heated to about 40°C. to about 80° C. for at least 60 minutes. In another non-limitingembodiment, the mixture can be heated to about 50° C. to about 75° C.for at least 120 minutes. In yet another non-limiting embodiment, themixture can be heated to about 55° C. to about 65° C. for at least 150minutes.

The solvent can be water; methanol; acetone; benzene; the other alcoholsand/or glycols including but not limited to ethanol, isopropanol (IPA),tert-butyl alcohol (TBA), glycol, ethylene glycol, propylene glycol,diethylene glycol, and dipropylene glycol; and mixtures thereof. In onenon-limiting embodiment, the solvent is water. In another non-limitingembodiment, the solvent is methanol. In yet another embodiment, thesolvent is a mixture of water with methanol, ethanol, or isopropanol.

The appropriate amounts of the lactone compound and the alkyl diamine oramino alcohol compound can be determined by a skilled artisan. In onenon-limiting embodiment, the molar ratio of the lactone compound to thealkyl diamine compound or amino alcohol compound ranges from about 10:1to about 1:10. In another non-limiting embodiment, the molar ratio ofthe lactone compound to the alkyl diamine compound or amino alcoholcompound ranges from about 8:1 to about 1:8. In yet another non-limitingembodiment, the molar ratio of the lactone compound to the alkyl diaminecompound or amino alcohol compound ranges from about 5:1 to about 1:5.In yet another non-limiting embodiment, the molar ratio of the lactonecompound to the alkyl diamine compound or amino alcohol compound rangesfrom about 2:1 to about 1:2.

In order to obtain the maximum hair strength, the hair care compositionhereinafter further comprises a sufficient quantity of a buffer systemto adjust a pH to about 2 to about 6. The buffer system can be anycombination of an acid and a base. Typically, the buffer systemcomprises an inorganic and/or an organic acid and/or a salt thereof toprovide the hair care composition with a pH value from about 2 to about6 at 25° C. In one non-limiting embodiment, the pH value can range fromabout 3 to about 5. In another non-limiting embodiment, the pH value canrange from about 3 to about 4.

In one aspect of the buffering system, the inorganic acid is selectedfrom the group consisting of hydrogen chloride (HCl), sulfuric acid(H₂SO₄), nitric acid (HNO₃), phosphoric acid (H₃PO₄), and combinationsthereof.

In another aspect of the buffering system, the organic is selected fromthe group consisting of an alpha-hydroxy acid, a polycarboxylic acid,and combinations thereof. Accordingly, the organic acid has an acidicfunctional group having a pKa of about 4.5 or less. In one non-limitingembodiment, the organic has a second acidic functional group having apKa of about 6 or less.

The organic acid may have a molecular weight less than about 500 gramsper mole (g/mol). For example, but not by way of limitation, themolecular weight of the organic acid may be from about 90 g/mol to about400 g/mol, or from about 100 g/mol to about 300 g/mol, or from about 130g/mol to about 250 g/mol, or from about 150 g/mol to about 200, or about190 g/mole. In another aspect, the organic acid may be soluble in waterin an amount greater than about 0.2 moles per liter at 25° C. Forexample, but not by way of limitation, the water solubility of theorganic acid may be about 0.3 mol/L or more, or about 0.4 mol/L or more,or about 0.5 mol/L or more.

Examples of the organic acids can include, but are not limited to,lactic acid, citric acid, tartaric acid, gluconolactive acid, pimelicacid, glyoxylic acid, aconitic acid, ethylenediaminetetraacetic acid,L-glutamic acid, malic acid, malonic acid, and combinations thereof.

Examples of the salt of such an inorganic acid and an organic acid caninclude its alkali metal salts such as the sodium salt and the potassiumsalt; its ammonium salt; and s alkanolamine salts such as thetriethanolamine salt.

The hair composition of the presently disclosed and/or claimed inventiveconcept(s) can further comprise at least one active hair benefitcomponent. The active hair benefit component can include, but are notlimited to, a rheology modifier, a surfactant, an auxiliary fixative, asolvent, water, a conditioner, a propellant, a neutralizing agent,fragrance, a fragrance solubilizer, a thickener, preservative, anemulsifier, emollient, humectant, colorant, wax, and mixtures thereof.

Other active hair benefit components can include, but are not limitedto, fatty acid soap, suspending aids, vitamins, hair growth promoters,self-tanning agents, sunscreens, anti-dandruff agents, anti-inflammatorycompounds, analgesics, antiperspirant agents, deodorant agents, hairfixatives, particulates, abrasives, moisturizers, antioxidants,keratolytic agents, anti-static agents, foam boosters, hydrotropes,solublizing agents, chelating agents, antimicrobial agents, antifungalagents, pH adjusting agents, chelating agents, buffering agents,botanicals, oxidizing agents, reducing agents, hair bleaching agents,pigments, anticaries, anti-tartar agents, and anti-plaque agents.

The surfactant can be an anionic surfactant, a cationic surfactant, anamphoteric and zwitterionic surfactant, a nonionic surfactant andcombinations thereof.

Examples of the anionic surfactants can include, but are not limited to,the alkyl sulphates, alkyl ether sulphates, alkaryl sulphonates,alkanoyl isethionates, alkyl succinates, alkyl sulphosuccinates, N-alkylsarcosinates, alkyl phosphates, alkyl ether phosphates, alkyl ethercarboxylates, and alpha-olefin sulphonates, especially their sodium,magnesium, ammonium and mono-, di- and triethanolamine salts. The alkyland acyl groups generally contain from 8 to 18 carbon atoms and may beunsaturated. The alkyl ether sulphates, alkyl ether phosphates and alkylether carboxylates may contain from 1 to 10 ethylene oxide or propyleneoxide units per molecule.

Typical anionic surfactants for use in the hair composition of thepresently disclosed and/or claimed inventive concept(s) can include, butare not limited to, sodium oleyl succinate, ammonium laurylsulphosuccinate, ammonium lauryl sulphate, sodium dodecylbenzenesulphonate, triethanolamine dodecylbenzene sulphonate, sodium cocoylisethionate, sodium lauryl isethionate and sodium N-lauryl sarcosinate.In one non-limiting embodiment, anionic surfactants can be sodium laurylsulphate, triethanolamine monolauryl phosphate, sodium lauryl ethersulphate 1 EO, 2EO and 3EO, ammonium lauryl sulphate and ammonium laurylether sulphate 1EO, 2EO and 3EO.

Examples of amphoteric and zwitterionic surfactants can include, but arenot limited to, alkyl amine oxides, alkyl betaines, alkyl amidopropylbetaines, alkyl sulphobetaines (sultaines), alkyl glycinates, alkylcarboxyglycinates, alkyl amphopropionates, alkylamphoglycinates, alkylamidopropyl hydroxysultaines, acyl taurates and acyl glutamates, whereinthe alkyl and acyl groups have from 8 to 19 carbon atoms. Typicalamphoteric and zwitterionic surfactants for use in the hair compositionof the presently disclosed and/or claimed inventive concept(s) caninclude lauryl amine oxide, cocodimethyl sulphopropyl betaine andpreferably lauryl betaine, cocamidopropyl betaine and sodiumcocamphopropionate.

The hair composition can also include co-surfactants, to help impartaesthetic, physical or cleansing properties to the composition. In onenon-limiting embodiment, the nonionic surfactant can be included in anamount ranging from 0% to about 5% by weight based on total weight ofthe hair composition.

For example, representative nonionic surfactants in the haircompositions of the presently disclosed and/or claimed inventiveconcept(s) can include condensation products of aliphatic (C₈-C₁₈)primary or secondary linear or branched chain alcohols or phenols withalkylene oxides, usually ethylene oxide and generally having from 6 to30 ethylene oxide groups.

Other representative nonionics include mono- or di-alkyl alkanolamides,Examples include coco mono- or di-ethanolamide and cocomono-isopropanolamide.

Further nonionic surfactants which can be included in the haircompositions of the presently disclosed and claimed inventive concept(s)are the alkyl polyglycosides (APGs). Typically, the APG is one whichcomprises an alkyl group connected (optionally via a bridging group) toa block of one or more glycosyl groups. Preferred APGs are defined bythe following formula:RO-(G)_(n)wherein R is a branched or straight chain alkyl group which may besaturated or unsaturated and G is a saccharide group.

R may represent a mean alkyl chain length of from about C₅ to about C₂₀.Preferably R represents a mean alkyl chain length of from about C₈ toabout C₁₂. Most preferably the value of R lies between about 9.5 andabout 10.5. G may be selected from C₅ or C₆ monosaccharide residues, andis preferably a glucoside. G may be selected from the group comprisingglucose, xylose, lactose, fructose, mannose and derivatives thereof.Preferably G is glucose.

The degree of polymerization, n, may have a value of from 1 to about 10or more. Preferably, the value of n lies in the range of from about 1.1to about 2. Most preferably the value of n lies in the range of fromabout 1.3 to about 1.5.

Suitable alkyl polyglycosides for use in the presently disclosed and/orclaimed inventive concept(s) are commercially available and include forexample those materials identified as: Oramix™ NS10 (available fromSeppic); Plantaren™ 1200 and Plantaren™ 2000 (available from Henkel).

The conditioning agent can be silicones, organic conditioning oils,natural and synthetic waxes, and cationic polymers.

The silicone can be silicone fluids, silicone oils, cationic silicones,silicone gums, high refractive silicones, silicone resins, emulsifiedsilicones, and dimethicone copolyols.

The rheology modifier or the rheology modifying polymer comprises apolymer selected from the group consisting of carboxymethyl cellulose,hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethylcellulose, hydroxypropyl guar, hydroxymethyl hydroxyethyl cellulose, andcombinations thereof.

The hair composition in the presently disclosed and/or claimed inventiveconcept(s) can also be used to protect hair color against fading and/orshampoo washings. The color protection treatment can be delivered by apost-color treatment (after dyeing of hair), either from a leave-inproduct or a rinse-off production or a combination thereof.

The following examples illustrate the presently disclosed and/or claimedinventive concept(s), parts and percentages being by weight, unlessotherwise indicated. Each example is provided by way of explanation ofthe presently disclosed and claimed inventive concept(s), not limitationof the presently disclosed and claimed inventive concept(s). In fact, itwill be apparent to those skilled in the art that various modificationsand variations can be made in the presently disclosed and claimedinventive concept(s) without departing from the scope or spirit of theinvention. For instance, features illustrated or described as part ofone embodiment, can be used on another embodiment to yield a stillfurther embodiment. Thus, it is intended that the presently disclosedand claimed inventive concept(s) covers such modifications andvariations as come within the scope of the appended claims and theirequivalents.

EXAMPLES Preparation of Reaction Products Example 1—Reaction ofGluconolactone with Ethylene Diamine in Water

3.2 g ethylene diamine (EDA), 23.9 g water and 35.6 g L-gluconic aciddelta-lactone (GDL) were sequentially added into a 3-neck flask to forma mixture. Under nitrogen, the mixture was gradually heated to about 60°C. and kept for about 2.5 hours. Then, the temperature was decreased to50° C. and the formed end product was poured into a container. Once thetemperature was lowered to room temperature (˜21-23° C.), the endproduct was obtained. Analytical results showed that the end productincluded N,N′-ethylenebis-D-gluconamide, N-(2-aminoethyl)-D-gluconamide,and GDL.

Example 2—Reaction of GDL with Ethanolamine in Water

6.16 g ethanolamine (EA), 15 g water and 17.9 g L-gluconic aciddelta-lactone were sequentially added into a 3-neck flask to form amixture. Under nitrogen, the mixture was gradually heated to about 60°C. and kept at that temperature for about 2.5 hours. Then, thetemperature was decreased to 50° C. and the formed end product waspoured into a container. Once the temperature was lowered to roomtemperature (˜21-23° C.), the end product was obtained.

Example 3—Reaction of FDL with Ethylene Diamine in Methanol

2.40 g ethylenediamine, 79 g methanol and 14.26 g L-gluconic aciddelta-lactone were sequentially added into a 3-neck flask to form amixture. Under nitrogen, the mixture was gradually heated to reflux andkept at that temperature for about 2.5 hours. Then, the temperature wasdecreased to room temperature (˜21-23° C.). The final product wasfiltered and dried. The white powder product was obtained.

Example 4—Reaction of GDL with 3-Amino-1-Propanol in Water

15.0 g 3-amino-1-propanol (APA), 35.6 g L-gluconic acid delta-lactoneand 50 g water were sequentially added into a 3-neck flask to form amixture. Under nitrogen, the mixture was gradually heated to about 75°C. and kept at that temperature for about 2.5 hours. Then, thetemperature was decreased to 50° C. and the formed end product waspoured into a container. Once the temperature was lowered to roomtemperature (˜21-23° C.), the end product was obtained.

Example 5—Reaction of GDL with 3-Amino-1-Propanol in Methanol

5.0 g (0.2 moles) 3-amino-1-propanol, 200 g methanol and 35.6 g (0.2moles) L-gluconic acid delta-lactone (GDL) were sequentially added intoa 3-neck flask. The mixture was gradually heated under nitrogen toreflux at 60° C. and kept at that temperature for about 2.5 hours. Thereaction was allowed to cool to ambient temperature (˜21-23° C.). Thereaction mixture was filtered and the product was dried in a ventilatedoven at 60° C. to give a gluconamide as a white powder.

Example 6—Reaction of GDL with Tris(Hydroxymethyl)Aminomethane inMethanol

54.0 g L-gluconic acid delta-lactone, 18.3 g ethanolamine and 300 gmethanol were sequentially added into a 3-neck flask to form a mixture.Under nitrogen, the mixture was gradually heated to reflux and kept atthat temperature for about 2.5 hours. Then, the temperature wasdecreased to room temperature (˜21-23° C.). The final product wasfiltered and dried. The white powder product was obtained.

Example 7—Reaction of GDL with Tris(Hydroxymethyl)Aminomethane in Water

50.0 g L-gluconic acid delta-lactone, 34.0 gtris(hydroxymethyl)aminomethane (THMAM) and 70.2 g water weresequentially added into a 3-neck flask to form a mixture. Undernitrogen, the mixture was gradually heated to about 75° C. and kept atthat temperature for about 2.0 hours. Then, the temperature wasdecreased to 50° C. and the formed end product was poured into acontainer. The end product containing 55 wt % of solids in water wasobtained.

Example 8—Mixture of GDL with 3-Amino-1-Propanol in Water

5.8 g of gluconic acid (50 wt % in water) and 7.5 g of3-amino-1-propanol were mixed in a beaker at room temperature (˜21-23°C.) for 1 hour.

Measurement of the Reaction Products

Sample Preparation:

For aqueous samples: About 200 mg of the sample was dissolved in 1.3 gD₂O to form a solution. The sample solution was then transferred to a 5mm NMR tube for analysis.

For solid samples: About 100 mg of the sample was dissolved in 1.4 g D₂Oto form a solution. The sample solution was transferred to a 5 mm NMRtube for analysis.

NMR Measurement:

Quantitative ¹H NMR spectrum was recorded using a Varian 400 MHz NMRspectrometer using PFG-1 probe. Acquisition parameters were as follows:

Temperature 297K,

Sweep width 16 ppm,

Pulse width 90 deg.,

Number of scans 16, and

Relaxation delay 30 s.

The spectrum was phase and baseline corrected using standard practice.The spectrum was calibrated assigning the trimethylsilyl propanoic acid(TSP) reference peak to 0.0 ppm.

For the Reaction Products of Diamine (EDA) and GDL:

Region A (I_(A))=3.50-3.40 ppm (singlet)

Region B (I_(B))=3.4-3.25 ppm (singlet)

Region C (k)=3.25-3.10 ppm (triplet)

Diamide/Monoamide/Amine-Gluconic Acid Salt Molar Ratios were Calculatedas Follows:Diamide=(I _(A))/(I _(A) +I _(B)+2I _(C)).Monoamide=(2I _(C))/(I _(A) +I _(B)+2I _(C)).Amine-Gluconic Acid Salt=(I _(B))/(I _(A) +I _(B)+2I _(C)).

For the Reaction Product of Amine Alcohol Compound (EA/APA) and GDL:

Region A (I_(A))=4.40-4.20 ppm (doublet)

Region B (I_(B))=4.25-4.10 ppm (doublet)

Monoamide/Amine-Gluconic Acid Salt Molar Ratios were Calculated asFollows:Monoamide=(I _(A))/(I _(A) +I _(B)).Amine-Gluconic Acid Salt=(I _(B))/(I _(A) +I _(B)).

Table 1 lists the measurement results of the reaction products fromExamples 1-7.

TABLE 1 Mole % GDL/Amine Mole % Mole % Amine-Gluconic Sample (MolarRatio) Monoamide Diamide Acid Salt Example 1 2:1 42 56 2 Example 2 1:154 — 46 Example 3 1:1 88 10 2 Example 4 1:1 59 — 41 Example 5 1:1 >99 —<1 Example 6 1:1 >99 — <1 Example 7 1:1 7 — 93Hair Strengthening Test

Virgin dark Caucasian hair was used (available from International HairImporters, Glendale, N.Y., USA). Double-bleached dark Caucasian hair wasobtained by bleaching the virgin dark Caucasian hair for 60 minutes withtwo parts of 12% H₂O₂ cream and one part of bleaching powder LockblondBlue (potassium persulfate, available from Hair Beauty & Care, Belgium).The double-bleached hair was then rinsed and washed with 4.5 wt % ofbasic SLES solution.

1. Measurement of Survival Characteristic Life Time

The end products obtained from Examples 1-5 and 7-8 were directlydiluted with water into 1 wt % of aqueous solutions. The pH of theaqueous solutions was adjusted to about 4 using lactic acid or lacticacid/sodium hydroxide in Example 1 and tartaric acid or tartaricacid/sodium hydroxide in other Examples. A section of hair fibers (>50hair fibers, hereinafter “the hair”) was cut from the top of the hairswitch. The hair was soaked into the aqueous solution for about 30minutes without agitation. Then the hair was taken out and dried at acontrolled temperature of 23±2° C. and a controlled room humidity of50±5%. The middle part of each hair fiber was cramped with PVC-linedbrass crimps. After each hair fiber was crimped, the hair was kept forat least 2 hours at the controlled temperature and the controlled roomhumidity for equilibrating.

A Cyclic Tester (CYC 801) was used for cyclic tensile test andmeasurement, along with an automatic hair sample loading module ASL1500(loaded with 50 hair fibers) and a Fiber Dimensional Analysis System(FDAS 765 Model) which is incorporated with Mitituyo Laser MicrometerLSM 500 for measuring the diameter for each hair fiber. The instrumentand its accessories were available from Dia-Stron Limited, Andover, UK.

The diameter of each hair fiber was measured and averaged over fivemeasurements before the cyclic tensile test. Measurement of survivalcharacteristics of the virgin and damaged or weaken hair with andwithout treatment using the reaction products of the presently disclosedand/or claimed inventive concept(s) was conducted under repeated tensileloading. The loading force was calculated based on the measured diameterof each hair fiber and applied to the corresponding fiber so that theconstant stress (gram/hair cross section surface area) was applied tothe single hair fiber. Fifty (50) hair fibers were loaded for repeatingmeasurement with a speed of 40 mm per minute. The tensile test was endedwhen all of the hair fibers were broken or reached the maximum cycles of100,000. The cycle number of breaking each hair fiber was recorded. Thesurvival probabilities of the treated and untreated (control) hairfibers versus cycle numbers were obtained using UvWin OC ApplicationSoftware (available from Dia-Stron Limited UK), which was based onWeibull analysis. The data are shown in Table 2 (using 0.0165 g/μm²stress control) and Table 3 (using 0.0140 g/μm² stress control). TheWeibull α-parameter or characteristic life time was the cycle numbersfor breaking 63.2% of the hair fibers. For each test group, thenormalized data was calculated based on the following equation:

${{Normalized}\mspace{14mu}{Data}} = {\frac{{Chracteristic}\mspace{14mu}{Life}\mspace{14mu}{Time}\mspace{14mu}{for}\mspace{14mu}{Treated}\mspace{14mu}{Hair}}{{Characteristic}\mspace{14mu}{Life}\mspace{14mu}{Time}\mspace{14mu}{for}\mspace{14mu}{Untreated}{\mspace{11mu}\;}{Hair}} \times 100}$2. Differential Scanning Calorimetry (DSC) Measurement

DSC is based on the fact that all materials have abilities to absorbcertain amounts of energy on heating. This amount of energy is sensitiveto changes in the structure, phase, and composition of the material. Forexample, the amount of energy that the material absorbs may change whenthe material undergoes a change in crystal structure, phase transitionsuch as melting, or loss of water.

DSC techniques published earlier by Cao (J. Cao, Melting Study of theCrystallites in Human Hair by DSC, Thermody. Acta, 335 (1999) and F. J.Wortmann (F. J Wortmann, C. Springob, and G. Sendlebach, Investigationsof Cosmetically Treated Human Hair by DSC in Water, IFFCC. Ref 12 (2000)are used to study the structural changes of hair by measuring thethermal decomposition pattern or behavior. The thermal stability of hairis evaluated by measuring the amount of thermal energy required fordenaturation or phase transition. The technique measures the amount ofheat transferred into and out of a sample in a comparison to areference. The heat transfer in (endothermic) and out (exothermic) isdetected and recorded as a thermogram of heat flow versus temperature.

The DSC technique yields thermogram data on the denaturation temperatureT_(d) and the denaturation enthalpy (delta H) of hair. It is concludedthat the thermogram data of the denaturation temperature T_(d) of hairis dependent on the crosslink density of the matrix in which surroundsthe microfibrils or crystalline filaments. Also, the denaturationenthalpy (delta H) depends on the strength of the crystalline filamentsor microfibrils. It has been shown that cosmetic treatments, such asbleaching or perming, affect these morphological components selectivelyand differently at different rates causing changes in denaturationtemperatures and in heat flow. The lower the denaturation temperaturethe more damaged is the hair.

DSC was used to analyze the effects of the treatment in the presentlydisclosed and/or inventive concept(s). The hair samples were analyzedusing TA Instrument DSC Q-2000. Linear baseline was used to determinedenaturation enthalpy.

The end products obtained from Examples 1-5 and 7-8 were directlydiluted to 1 wt % of aqueous solutions. The pH of the aqueous solutionswas adjusted to about 4 using lactic acid or lactic acid/sodiumhydroxide in Example 1 and tartaric acid or tartaric acid/sodiumhydroxide in other Examples. The hair was soaked in the aqueous solutionfor about 30 minutes. Then the hair was rinsed with tap water for about20 to about 30 seconds. The hair was dried by patting with paper towelsto remove excess water. While damp, the hair was cut into 2-4 mm inlength with scissors and then was dried at ambient temperatureconditions and relative humidity (20-23 C.°, 50-55% RH) for about fiveminutes. The hair was weighed to about 5 to 7.5 mg and put into a highpressure stainless steel pan. About 45 ml of water was added into thepan. Five pans were prepared for each hair fiber. The hair fibers wereequilibrated at 20° C. for about two minutes. The hair fibers wereheated up to 175° C. at 2° C. per minute. The hair fibers were thencooled down to 20° C. at 20° C. per minute. The hair fibers wereequilibrated at 25° C. The measured data was listed in Tables 2 and 3,in which ΔT was calculated based on the difference of T_(d) obtainedfrom the control hair and the corresponding treated hair with the endproducts.

TABLE 2 Charac- Test Reactant teristic Normalized DSC Group No. HairProduct Life Time Data ΔT (° C.) Caucasian None 3479 — — virgin hair I2x None 981 — — Bleached Example 1 5781 589 — hair Example 3 8925 9103.4

TABLE 3 Charac- Test Reactant teristic Normalized DSC Group No. HairProduct Life Time Data ΔT (° C.) Caucasian None 6838 — — virgin hair II2x None 1241 — — Bleached Example 5 9723 783  1.9 hair III 2x None 2940— — Bleached Example 2 6184 210 11.7 hair Example 7 7838 267 11.7 IV 2xNone 5843 — — Bleached Example 4 12306 211 10.9 hair V 2x None 6103 — —Bleached Example 8 5978  98 11.2 hair

The results show that, after the treatment of double-bleached hair withthe samples obtained from the presently disclosed and/or claimedinventive concept(s), the anti-stressing capacity of the damaged hair isstrengthened in comparison with the untreated hair. Moreover, thestrengths of the damaged hair are increased and even higher than thoseof virgin hair. The results also show that the denaturation temperatureis higher for the treated hair compared to those untreated damaged hair.

Hair Color Protection

Virgin dark Caucasian hair was dyed with Clairol Textures & Tones 4R(Red Hot Red) at 40° C. for 45 minutes. The hair was then rinsed for 2minutes. After rinsing, the hair was treated in 0.5 wt % of solutioncontaining the sample of Example 5, or treated in rinse-off conditioner,or combination of the solution and the rinse-off conditioner for 1minute. The hair was dried overnight. Then the hair was soaked either inwater or a 2% shampoo solution for 45 minutes. Absorbance was measuredat 490 nm on Cintra 20 double beam UV-vis spectrometer using the soakingsolution. 2.5 ml cell with 12.5×12.5×45 mm was used for the measurement.The lower the absorbance the less color leached from the hair. Table 4lists the measurement results.

TABLE 4 Treatment Soaking Solution Absorb. None 2% Shampoo 0.4507 0.5%Solution* 2% Shampoo 0.3053 None Water 0.444 0.5% Solution Water 0.3213Rinse-off Conditioner 2% Shampoo 0.1956 Rinse-off Conditioner + 2%Shampoo 0.1603 0.5% Solution Rinse-off Conditioner Water 0.203 Rinse-offConditioner + Water 0.168 0.5% Solution *containing 0.5 wt % of thesample of Example 5

What is claimed is:
 1. A method of strengthening hair fibers comprisingapplying a hair composition represented by one or both of the followingformulas:

wherein R₁-R₄ are a hydroxyl group, and R₅ and R₆ are independentlyhydrogen, or a —CH₂CH₂ CH₂OH group; and wherein R′₁-R′₄ are a hydroxylgroup and R′₅ and R′₆ are independently hydrogen, or a —CH₂CH₂CH₂OH—group.
 2. The method of claim 1, wherein a pH value of the haircomposition is adjusted to about 2 to about 6 by using a buffer system.3. The method of claim 2, wherein the buffer system comprises an acid ora salt.
 4. The method of claim 3, wherein the acid is an organic acidselected from the group consisting of lactic acid, citric acid, tartaricacid, gluconolactive acid, pimelic acid, glyoxylic acid, aconitic acid,ethylenediaminetetraacetic acid, L-glutamic acid, malic acid, malonicacid, and combinations thereof.
 5. The method of claim 3, wherein theacid is an inorganic acid selected from the group consisting of hydrogenchloride (HCl), sulfuric acid (H₂SO₄), nitric acid (HNO₃), phosphoricacid (H₃PO₄), and combinations thereof.
 6. The method of claim 1,wherein the hair composition further comprises at least one active hairbenefit component selected from the group consisting of surfactants,fatty acid soap, hair and skin conditioning agents, suspending aids,emollients, emulsifiers, rheology modifiers, thickening agents,vitamins, hair growth promoters, self-tanning agents, sunscreens, skinlighteners, anti-aging compounds, anti-wrinkle compounds, hair coloringtreatment agents, hair color protecting agents, hair styling products,anti-cellulite compounds, anti-acne compounds, anti-dandruff agents,anti-inflammatory compounds, analgesics, antiperspirant agents,deodorant agents, hair fixatives, particulates, abrasives, moisturizers,antioxidants, keratolytic agents, anti-static agents, foam boosters,hydrotropes, solublizing agents, chelating agents, antimicrobial agents,antifungal agents, pH adjusting agents, chelating agents, bufferingagents, botanicals, hair colorants, oxidizing agents, reducing agents,hair and skin bleaching agents, pigments, anticaries, anti-tartaragents, anti-plaque agents, solvents, and combinations thereof.
 7. Themethod of claim 6, wherein the rheology modifier is a polymer selectedfrom the group consisting of carboxymethyl cellulose, hydroxyethylcellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose,hydroxypropyl guar, hydroxymethyl hydroxyethyl cellulose, andcombinations thereof.
 8. The method of claim 7, wherein the rheologymodifier is present in an amount ranging from about 0.1 to about 1.5 wt% based on the total weight of the hair composition.
 9. The method ofclaim 1, wherein the hair fibers comprise virgin hair fibers, damagedhair fibers, bleached hair fibers, or colored hair fibers.